Improvement in lamp-reflectors



` No.. 35,644. Paiemed June 17,1862;

i To all whom it "may concern.-

" UNITED simpa` RATEIWFv OFFICE.

` jJoB WILLIAMs, "oF PHILADELPHIA, PENNSYLVANIA..

j V'iiMPRovl-:MENT IN LAMP-REFLECTORS.

" Specification forming part of Letters Patent No. 35,644, dated June 17,1St32.

\ ABe itknownthat I, JOB T. WILLIAMs-of Philadelphia, Pennsylvania, have invented an Improvement 'in IRefie'ctors for Lamps, V85e.;

andI do `herebyl declare the following .to be a full, clear, andeXact description of the same,

` reference being hadft'o theaccompanying drawings, and toQthelettcrs of reference marked thereon.`

#My invention consists of a circular reflector composed of an outer concave' rim and central convex projection and having radial ribs or l corrugations,thewhole being constructed and arranged inthemanner described hereinafter, for the purposeofincreasing the reflectingf l surface, reflecting the rays of light at a variety ofanglcs, and increasing the illuminating effect. j,

In orderjtol` enable others` to makemy invention,I willnowproceed to` describe the manner invvhich itis formed and constructed.

i O n reference to the accompanying drawings, which form apart of this specication, Figure 17 `is a front vievv of my improved reflector; Fig; 2, a sectional view on a line drawn through "the center of the reflector; and Fig. 3, an edge view, partly in section.

I Similar letters referto'similar parts throughout the several lviews.

As far as `regardsthe general form of the reflector, it is similarto the circular reflectors used in conncetionwith lamps, lanterns, gasp lights, Src., the `outer rim, a, representing on I the face a portion of a coneavedisk meetin the central convercprojection, b. v

. Instead `(if-making these reiiectors as heretofore with plain surfaces, I form on them a series of corrugations radiating from the centlecto r.

ter, all the corrugations being of the same size,

Vand their convex sides' appearing on the face, as seen in Fig. '8. A circular portion, how- Y ever, in the center of the convex projection b of the reiiector is plain, and from the edge of this plain portion the radial corrugations are continued over the remaining portion of the convex projection b and over the concave portion a, the corrugations of course diminishing in Width as they approach the center of the re Not only is an extended lreilectingsurface afforded by these corrugations, but the rays of light are relected'ata variety of angies, andare dispersed to such an extent that much greater brillianc'y and illuminating ef! fect is obtained than lfrom an ordinary plain reliector.

In some cases the reflector has to be applied to the chimney of a lamp, in which case a hole of suitable dimensions is made in the center of the reflector.

I do not desire to claim, broadly, a reflector with ribs or corrugations; but' i I claim as my invention and desire to secure by Letters'Patent 4 j 'Ihe reflector composed of the outer concave rim, a, and central convex projection, b, and

having radial ribs or corrugations, the whole being constructed and arranged asv and for the purpose herein set forth.

In testimony whereof .I have signed my naine to this specification in the presence of two subscribing witnesses.

JOB T'. WILLIAMS.

VVitneSSes:

HENRY HoWsoN, l JOHN WHITE. 

